Outboard motor propeller and pump



Sept-21, 4 M. L. WILLIAMS ou'raomo MOTOR PROPELLER AND PuuP Filed Dec. 28. 1951 ATTORNEYS f atented Sept. 21, 1954 UNITED STATES PATENT OFFICE OUTBOARD MOTOR PROPELLER AND PUMP Martin L. Williams, East Detroit, Mich. Application December 28, 1951, Serial No. 263,787

1 Claim. 1

This invention relates to propellers and propeller mountings of out-board motors, and in particular a propeller having radially disposed passages extended through the blades with the inner ends of the passages connected through the hub and mounting of the propeller to the interior of a boat whereby rotation of the propeller creates suction through the passages and the suction withdraws Water or other fluid from a low point in the boat.

The purpose of this invention is to provide means for automatically removing water from the interior of a boat as the propeller of the boat is in operation.

Various devices have been provided for bailing out ships, boat hulls and the like, however, where an out-board motor boat is used in rough weather and where the only motive power is that used for driving the propeller, it is difiicult to remove Water accumulations in the hull.

With this thought in mind this invention contemplates the method of utilizing a driving propeller of a boat as a centrifugal rotor for creating suction that may be used for continuously bailing out the boat.

The object of this invention is, therefore, to

provide means for constructing a propeller and a mounting therefor whereby the rotary motion of the propeller creates suction through the mounting and wherein the suction created by the propeller may be used for removing water accumulating in the boat.

Another object of the invention is to provide means for converting the propeller of an outboard motor into a rotary pump without changing the size or general design and arrangement of the parts.

A further object of the invention is to provide an out-board motor and propeller mounting with suction passages extending therethrough, which is of a simple and economical construction.

With these and other objects and advantages in view the invention embodies a propeller housing or mounting in the form of a propeller mounting having a passage extended there-: through with propeller driving means therein, and a propeller having radially disposed passages extended through the blades, with the passages positioned to communicate with the passages in the propeller mounting and wherein the propeller is adapted to be carried by a shaft extended from the driving means of the housing or propeller mounting.

Other features and advantages of the invention will appear from the following description taken in connection with the drawings wherein:

Figure 1 is a side elevational view of the lower end of a propeller boot of an outboard motor mounting with parts broken away and shown in section.

Figure 2 is an end elevational view taken on line 2-2 of Figure 1 showing the inner face of the hub of the propeller.

Figure 3 is a cross section taken on line 3--3 of Figure 1 showing the suction passages in the boot or propeller mounting housing.

Referring now to the drawing wherein like reference characters denote corresponding parts the improved out-board motor propeller mounting of this invention includes a propeller having a hub H) with blades ll extended therefrom and having passages l2 extended radially through the blades and communicating with an annular passage I3 in the face of the hub I0, a propeller mounting or boot 14 having a hub l5, and an insert it positioned in a recess H in the face of the hub of the boot and having an annular recess l8 registering with the recess [3 and communicating with a suction passage [9 that may be connected by a coupling 20 through a tube 2| extended into a boat upon which the propeller mounting is positioned.

The boot I4 is provided with conventional driving means for the propeller and the transmission of the driving means includes a shaft 22 that is journaled in the insert [6 with a bearing sleeve 23. The shaft extends from the insert to provide a mounting for the propeller. The hub 10 of the propeller is positioned on the extended end of the shaft 22 and secured in position with a lock nut 24 having a cotter pin 25 therethrough. The hub is also provided with a shear pin 26.

The insert I6 is secured in the recess I! with bolts 21 and the inner end of the insert is sealed with a gasket 28. Gaskets 29 and 39 are also provided in a recess 3| in the outer face of the insert I6 whereby the connection between the propeller and insert is sealed.

With the parts arranged in this manner, and with the end of the tube 2| extended to a low point in the boat, rotation of the propeller provides centrifugal motion which creates suction in the annular recess I3, and with the parts sealed, the suction draws from the passage l9 and the tube 2| whereby water accumulating in the low point of the boat is drawn through and discharged by the propeller.

By this means a continuously operating bilge pump is provided in an out-board motor proing side and positioned alol'ifid the said shaft,

an insert having an annular recess in the outer face thereof and a passage extended from" the" recess through the insert, said insert being:posi-: tioned in the recess of the propeller mounting and around the said propeller shaft, said pro peller mounting having a passage with a tube connection" on the outer end and-positioned .to

register with the passage extended from the recess of the insert, and a propeller having a hub with radially disposed blades extended therefrom with a recess in the face of the hub positioned to register with the annular recess of the insert and With radially disposed passages extended from said recess in the face of the hub through the said blades.

References Cited at theffil'e of this patent UNITED STATES PATENTS Number Name Date 239,046 Holland Mar. 22, 1881 496,812 Cardy May 2, 1893 1,742,938 Schumann Jan. '7, 1930 1,818,991 Irgens- Aug. 18, 1931 1,900,180 Harvey Mar. 7, 1933 2,151,225 Newton Mar. 21, 1939 2,530,664 Pye r -1 Nov. 21, 1950 2,604,867 Fryer- July 29, 1952 wam 

